Brush-retaining device



July 2, 1929. H. l.. MYERS BRUSH RETAINING DEVICE Filed May 26, 1927ws., MVJIII.

l L .aye 14S si By@ fttorfzqy Patented July 2, 1929.

UNITED STATES PATENT OFFICE.

HARRY I. m OF TOLEDO, OHIO, ASSIGNOR TO THE AMERICAN FLOOR HURTAD- BTG'MACHINE COMPANY, OF TOLEDO, OHIO.

BRUSH-mm@ DEVICE.

Application illed Iay, 1927. Serial No. 194,898.

The present invention relates broadl to an improved floor surfacingmachine o the single disc heavy duty type used for cleaning, waxing,brushing, polishing, and keeping Hooi-'s of various kinds in a desirablecondition and has more particular reference to a brush retainingl devicetherefor.

Brieiy, a machine of this type comprises a somewhat cylindrical gearcasing having a spun-steel guard or rim at its bottom. This rim providesa shield for a gear driven plate known as an adapter plate, and thelatter constitutes a mounting for a nick detachable surface treatingattachment, ere shown as a rotary brush.

The rim conceals and protects the plate and attachment. Connectedrigidly to one peripheral side of the casing is a wheeled truck uponwhich the major portion of a vertical electric motor is sup orted. Anopperating handle is rigidly astened to. said truck and extendsrearwardly and upwardly in the direction of the operator to the desii-edelevation.

An important aim and object is to provide, as a new product ofmanufacture, a special adapter plate equipped with novel retaining meansand an attachment having headed studs cooperable therewith, thesefeatures being characterized by an arrangement of details constructed toproduce an unusually practical and eiiicient rapid change coupling.

In the accompanying drawings forming a part of this application and inwhich like numerals are employed to designate like parts throughout thesame:-

Figure 1 is a perspective view of a machine constructed in accordancewith the invention showing the body tilted, the adapter plate exposed,and the attachment in readiness for placement.

Fi 2 is a view on an enlarged scale showing t e rim of the gear casingand detailing the specific coupling.

Fig. 3 is an enlarged fragmentary perspective view of a ortion of theadapter plate showing the principal part of the improved coupling.Before beginning the detailed description, attention is invited to thefact that onlythose parts of the machine which represent the allegednovelty have been shown in the drawings, all unessential details havingbeen purposely omitted to prevent the gist of the invention from beingobscured.

Proceedin in accordance with the foregolng, 1t wil be observed that thereference character 4 designates generally what is designated as atruck, the same 4being of appropriate configuration and including su1t-60 able Journals and sup orting wheels 5. Integrall connected witli thetruck casting is a soniew at cylindrical gear casing generallydesignated the reference character 6.

As far as t e alleged novelty of the inven- 05 tion is concerned, thiscasin may be of any appropriate configuration. t will be noted however,that the casing includes, as better shown in Fi 2,-an annular rim 7 atits bottom and a ru ber bumper 8. Confined within the area of the rim 7and spaced above the bottom edge of the same is a rotatably mounted partwhich is generally designated by the reference character 9 and which isspecifically known in the art as an adapter plate.

This is fastened to the driven shaft in any appro riate manner (notshown). Before descri ing in detail the adapter plate, it is desirableto state now that the reference character 10 designates an uprightmotor.

AIn practice this motor is sometimes referred to as a vertical interchaneable inotor. It is located to the right of t e axis of rotation of theadapter (plate and has its eatest weight sup orte above the truck.n-this connection, wish to point out that the truck wheels have'theadditional function of providing a fulcrum whereby the body of themachine, as an entirety, can be swung, from oo a horizontal operatingposition to a tilted vertical position. l

Here, it will be noticed that a handle 11 is rigidly fastened to thetruck at a point above the horizontal fulcrum just described. Theconnection between the handle and the truck is rigid and normall thehandle is used for pushing the truc and machine along the surface.However, it can be used as a lever for tilting the machine from thehorizontal working position, to the vertical interchanging position,whereupon the handle is employed as a prop and is intended to rest uponthe floor.

Its position with respect to the other parts are such as to insureproper balancing and self maintenance of the machine in this tiltedstate. Incidentall I might state that the handle is provide withcustomary hand grips 12 and switch box 13. 110

vus

Strictly with the tiltable feature of the machine, is the rapid eclamping device` which provides separa le joints between theadapterplate 9 and a surface treat- 'attachment 14, here shown in theform of a rush. In other words, the main vpurpose of having the bodytiltable, is to dispose the adapter plate in a readily accessiblenontiltable position to permit the operator to use both hands in applingand detaching the surface treating attac ment.

The continuity of function and advantage here is uite evident. Aparticular t pe of clamp an coupling means is employe to enhance theeciency of the arrangement just described, and this means is detailedespecially inFigs. 2 and 3. At this time, it 1s though advisable to callattention to the fact that the 'machine here shown represents a powerfulelectric machine for producing and maintainin a pleasing and durabletinish on floors o all kinds, including wood, terrazzo, marble,linoleum, tiles, cement, composition, or metal. v

as before indicated, it cleans, waxes, polishes, scrubs and sands. Forthis reason, the machine when marketed embodies a'number of attachmentsof the general construction represented in Fig. 1. For example, I use awaxing brush a polishing brush, a burnishing pad, a scru bing brush, awire brush for scouring, and a sandin pad, all of these beingconstructed along t e same general lines as the brush represented inFig. 1, and being adapted for separable connection with ,the adapterplate.

lIrrespective of the ty of attachment employed, the same embo iessurface treating means 15 and a backing member or head 16 the latterbeing rovided with small headed studs 17 rigidly astened atdiametrically opposite points to the backing` member, through the mediumof small attaching anges 18.

Individual, substantially diametrically opposite devices are provided onthe adapter plate for cooperation with each headed stud on the brush. Adescription of one device will suice for both, it is believed. Attentionis therefore particularly invited to Fig. 3, wherein it will be notethat the peripheral portion of the adapter plate 9 is provided with anarcuate or segmental raised por tion 19.

This portion is formed with a notch 20 at one end and a reduced keeperseat 21 at the opposite end, this seat being adapted for snu receptionof the shankA of the headed stu 17. Incidentally, it will be noticedthat the marginal edges of the notch are shaped to facilitate placementof the studs inthe keeper seats. In addition, on one side ofthe notch,is a clearance space 22 whose function will be made clear later.

Carried by o ne end portion of the raised part 19 1 s an elevated mount23 for a resilient chp generally designated by the reference charactercomprises a at sturdy spring arm 25 rigidly secured to the mount 23 andextending over and be ond the keeper seat 21 and into the area o thenotch 20. The overhanging rtion thereof is bifurcated to form a resiient retaining fork, the fingers of which are designated by thereference characters 26.

The extremities of these fingers are bent down as at 27 to permit thehead of the stud to ride upwardly thereon, and in between the fingers,for reception in the keeper seat. Here, I might state that the clearanceo ning 22 serves to allow the proper om of movement of one of thebeveled extremities 27. I desire to especially call attention to thefact that the crotch portion of the fork is spaced to the left of the condiiig portion of the keeper seat 21. us, the shank of the stud bearsdirectly a ainst the crotchportion of the keeper seat w ich is of heavymetal, rather than against the comparatively light weight spring clip24. This transfers an distri utes the stresses appropriately, bringingthe load against the heavy metals of the adapter plate rather thanagainst the clip and allowing the clip to function primarily as asupplemental guard and retainer to ,prevent retrograde rotation of thebrush or accidental displacement thereof.

In practice, it is understood that when the machine is in runnin`position, the adapter plate 9 is parallel to t e surface and the bodycomposed of parts 6 and 10, is in the vertical position. This brings thebristles of the brush into contact with the floor as shown in Fi 2.Thus, a threeint contact is had, t e brush resting against the surfaceand the truck wheels resting against the surface. The truck wheels thusserve for propelling the machine while the brush cleans the surface.

If it is desired to wax, burnish, lish or otherwise treat the surface ofthe oor after having cleaned the same with the brush, the brush isremoved by turning the headed studs out of the notches in a directionfrom left to right in Fig. 2. Then, the other attachment (not showng isplaced in position by inserting the stu s simultaneously into thenotches 20 and then turning the attachment in the direction of the arrowin Fig. 2.

Of course when interchan 'ng the attachment, the `handle 11 is movetoward the operator and forced down against the door, whereu on the bodyis rocked about the fulcrum o the truck wheels to assume the tiltedposition and to clearly expose the attaching devices on the adapterplate. Thus the machine is in a steady lposition to facilitateattachment and Adetac ment, giving the operawr free use of both hands.

In tilting the machine, it is of course moved into the direction of thearrow B while turning it down to operative position again it is moved inthe direction of the arrow A.

Having thus described my invention, what I claim as new is 1. In astructure of the class described, a plate having a notch in itsperiphery, said notch being provided with a stud entrance at one end,and a keeper seat at the opposite end a complemental art, a headed studcarried by said part an insertible through the entrance of said slot andturnable by rotary motion ofV said part into said keeper seat, and aspring clip carried by said plate, spaced from said plate and includingretaining fingers cooperable with said notch, said retaining fingersbeing ada ted to embrace the shank of said stud an to engage the head onsaid stud for maintaining said plate and part together for simultaneousrotation.

2. In a structure of the class described, a rotary plate provided with aperipheral slot having an entrance opening and a keeper seat, a part forcooperation with said plate provided with a body for contact with theplate, a headed stud including a shank insertible through the entranceof said slot and turnable by rotary motion of said part into said seat,

a raised mount carried by said plate, a resilient clip rigidly fastenedto said mount includin a forked end portion, the ngers of the for ofwhich overlie said seat and slot lo nbrace said shank and to engage said3. In a structure of the class described, a rotary plate provided with aperipheral slot having an entrance opening and a keeper seat, a art forcooperation with said plate rovi ed with a body for contact with the pate, a headed stud including a shank insertible through the entrance ofsaid slot and turnable by rotary motion of said part into said seat, araised mount carried by said plate, a resilient clip ri idly fastened tosaid mount including a for ed end portion, the fingers of the fork ofwhich overlie said seat and slot to embrace said shank and to enga esaid head, said fin ers terminating in beve ed extremities, an thecrotch of said fork being spaced away from the corresponding portion ofsaid seat to prevent the shank from engaging the crotch in said fork.

In testimony whereof I aiix my signature.

HARRY L. MYERS.

